Badger Meter Hydrometer - Manual (Page 9)

This thin gasket can be held in position by coating with a thin
film of cup grease to prevent shifting while assembling gland
and tube. A tube stop washer is then installed as the last item
in the bottom gland only.
CAUTION
Do not use cup grease on flowmeters for oxygen
service.
g. To assemble, place tube in position with aligning mark
toward front. Slip glands into position and secure with cap
screws. Tighten screws evenly.
h. Install scale and upper support post. Install screw holding
scale to lower support post. Align mark on scale with mark on
tube and tighten support post set screws.
i. Install lower end caps and tighten fillister head screws.
j. Install floats using rod to carefully lower float onto bottom
stop.
k. Install upper end caps and tighten fillister had screws.
l. Install bezel with window to front of instrument.
1-45. REPLACING BROKEN METERING TUBE. As all
tubes are calibrated with their floats, and scales graduated to
conform, replacement tubes are supplied with floats, scales,
and necessary gaskets. For removal and replacement of tubes
refer to paragraph 1-44. Damaged scales can be replaced by
giving tube size and serial number of the flowmeter. This
number is etched on tube near the stop and on the float shank.
1-46. REPLACING FLOAT STOPS. Float stops are rods
threaded on one end and screwed into end caps. Stops are
equipped with springs. To replace, grip stop in vise and
unscrew end cap and install new stop. Spring can be
unscrewed from old stop and installed on replacement. When
replacing float stop, the stop and end cap must be square.
1 -47. REPAIRS TO METAL TUBING AND FITTINGS. No
one except a repairman thoroughly experienced and competent
in making solder joints should be permitted to make repairs or
replacements on the metal tubing.
WARNING
If the vapor of the liquid used in this instrument
is highly volatile, the instrument must be
thoroughly cleaned before any heat is used in
disassembly.
1-48. REPLACING VALVES.
a. Disconnect inlet tube union to first stage and loosen all cap
screws in lower flanges holding manifold to valves and
Section I
Paragraphs 1-45 to 1-49
remove manifold. Remove cap screws from the upper flange
of the valves to be replaced and withdraw valves.
b. See that seals and seats are in position on both faces, insert
valve between flanges and install cap screws on top and
bottom flanges. Tighten upper screws and pull screws in
lower flange up evenly. Tighten inlet union. Connect handle
assembly to valve, utilizing pin and coupling.
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